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what should be the exhaust pipe size?
Posted: Tue Nov 04, 2003 12:45 am
by timucin
running for 400+hp's
no sound or emission control
planning to install a straight line and only one straight silencer at the back.
i thought 75mm diameter pipe.what do you think about this app?
thnx
Re: what should be the exhaust pipe size?
Posted: Tue Nov 04, 2003 6:43 pm
by markhalligan
Timucin,
I'm using a 3 inch (76mm) downpipe, and I think thats just about right, I also have a seperate straight through exhaust for the wastegate that exits just under the drivers door (right hand drive) although this is a bit loud when on full boost when the wastegate opens.
Mark.
Re: what should be the exhaust pipe size?
Posted: Wed Nov 05, 2003 12:09 am
by timucin
this is excellent idea.lots of company do that.but there is a sensor after wastegate and exhaust connection.doesnt it cause any problems?
cause i was planning the same thing but they told me that there is a sensor there and i cant do that.....
Re: what should be the exhaust pipe size?
Posted: Wed Nov 05, 2003 8:12 am
by Jani
That sensor is the lambda == O2 sensor. Doesn't affect WOT behaviour.
Shouldn't cause problems otherwise either, part of exhausts passes through downpipe, there is no harm letting wastegate exit directly out -other than the emissions.
Re: what should be the exhaust pipe size?
Posted: Wed Nov 05, 2003 12:15 pm
by timucin
ok i will do that!
[img]images/graemlins/thumbs.gif[/img]
Re: what should be the exhaust pipe size?
Posted: Wed Nov 05, 2003 7:31 pm
by markhalligan
Timucin,
I've attached a picture of the way mine has been fitted, but remember this gets very loud when the wastegate opens.
Mark.
Re: what should be the exhaust pipe size?
Posted: Wed Nov 05, 2003 8:42 pm
by timucin
Thnx for pic
[img]images/graemlins/smile.gif[/img]